Kinetics of One-Electron Oxidation of Thiols and Hydrogen Abstraction by Thiyl Radicals from .alpha.-Amino C-H Bonds

1994 ◽  
Vol 116 (26) ◽  
pp. 12010-12015 ◽  
Author(s):  
Rong Zhao ◽  
Johan Lind ◽  
Gabor Merenyi ◽  
Trygve E. Eriksen
Keyword(s):  
Hydrogen Abstraction ◽  
Thiyl Radicals ◽  
Kinetics Of

Ab Initio Study on the Kinetics of Hydrogen Abstraction for the H + Alkene → H2+ Alkenyl Reaction Class

2007 ◽  
Vol 111 (11) ◽  
pp. 2156-2165 ◽  
Author(s):  
Lam K. Huynh ◽  
Sylwester Panasewicz ◽  
Artur Ratkiewicz ◽  
Thanh N. Truong
Keyword(s):  
Ab Initio ◽  
Hydrogen Abstraction ◽  
Ab Initio Study ◽  
Kinetics Of

scholarly journals Experimental and Computational Investigations into Trivalent Phosphorous-Mediated Radical Thiol Desulfurization

2021 ◽  
Author(s):  
John Lopp ◽  
Valerie Schmidt
Keyword(s):  
Atom Transfer ◽  
Radical Intermediate ◽  
Thiyl Radicals ◽  
Trigonal Bipyramidal ◽  
Peptide Modification ◽  
Aliphatic Thiols ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Marked Dependence ◽  
Distorted Trigonal Bipyramidal

Radical-mediated thiol desulfurization processes using tricoordinate phosphorous reagents are used in a range of applications from small molecule synthesis to peptide modification. A combined experimental and computational examination of the mechanism and kinetics of the radical desulfurization of alkyl thiyl radicals using trivalent phosphorus reagents was performed. Primary alkyl thiols undergo desulfurization between 10^6 to 10^9 M-1s-1 depending on the phosphorus component with either an H-atom transfer step or β-fragmentation of the thiophosphoranyl intermediate may be rate-controlling. While the desulfurization of primary aliphatic thiols showed a marked dependence on the identity of phosphorous reagent used with either a rate-controlling H-atom transfer or -fragmentation, thiols yielding stabilized C-centered radicals showed much less sensitivity. Support for a stepwise S-atom transfer process progressing via a distorted trigonal bipyramidal thiophosphoranyl radical intermediate was obtained from DFT calculated energetics and hyperfine splitting values.

scholarly journals The C-H Bond Dissociation Enthalpies and Estimation of the Kinetics of Hydrogen Abstraction by OH radical for Fluorinated Formates: A DFT Study

2001 ◽  
Vol 2 ◽  
pp. 45-51 ◽  
Author(s):  
Shingo Urata ◽  
Tadafumi Uchimaru ◽  
Asit K. Chandra ◽  
Akira Takada ◽  
Akira Sekiya
Keyword(s):  
Hydrogen Abstraction ◽  
Dft Study ◽  
Oh Radical ◽  
Bond Dissociation ◽  
Kinetics Of

Detailed kinetics of hydrogen abstraction from trans-decalin by OH radicals: the role of hindered internal rotation treatment

2020 ◽  
Vol 22 (44) ◽  
pp. 25740-25746
Author(s):  
Tam V.-T. Mai ◽  
Lam K. Huynh
Keyword(s):  
Master Equation ◽  
Hydrogen Abstraction ◽  
Kinetic Mechanism ◽  
Oh Radicals ◽  
Rate Model ◽  
Wide Range ◽  
Detailed Kinetics ◽  
Kinetics Of ◽  
Detailed Kinetic Mechanism

The detailed kinetic mechanism of the trans-decalin + OH reaction is firstly investigated for a wide range of conditions (T = 200–2000 K & P = 0.76–76000 Torr) using the M06-2X/aug-cc-pVTZ level and stochastic RRKM-based Master equation rate model.

Kinetics of radical exchange in the reaction of CF3 radicals with tin tetramethyl

1976 ◽  
Vol 54 (10) ◽  
pp. 1617-1623 ◽  
Author(s):  
T. N. Bell ◽  
P. J. Young
Keyword(s):  
Exchange Reaction ◽  
Rate Constant ◽  
Additional Data ◽  
Hydrogen Abstraction ◽  
Arrhenius Parameters ◽  
Abstraction Reaction ◽  
Reaction Proceeds ◽  
Kinetics Of

The reaction of CF3 radicals with SnMe4 leads to hydrogen abstraction and also radical exchange.[Formula: see text]We propose the exchange reaction proceeds via a five coordinate intermediate. The Arrhenius parameters for the exchange reaction are,[Formula: see text]Additional data for the H abstraction reaction[Formula: see text]combined with previous data yields an improved rate constant for abstraction,[Formula: see text]

Sign in / Sign up

Export Citation Format

Share Document